package soundsystem;

import org.springframework.beans.factory.annotation.Qualifier;

/**
 * Created by jack on 18/5/29.
 */
@Qualifier("electronic")
public class MP4 {
    static int index = 0;
    public MP4() {
        System.out.println("mp4开启");
        index += 1;
    }

    @Override
    public String toString() {
        return "MP4{index = " + index + "}";
    }
}
